RIP2 Message Format

RIP-2 uses a special message format, or packet, to collect and share information about distances to known internetworked destinations. This packet contains the following structure:

• A 1-octet Command field

• A 1-octet Version Number field

• A 2-octet Address Family Identifier (AFI) field

• A 4-octet Networking Address (that is, IP address) field

• A 4-octet Subnet Mask field

Of these fields, only the Command, Version, and Unused fields are considered header fields. The remainder are routing data fields. Figure 9-1 illustrates the RIP-2 message format.

Figure 9-1: The RIP-2 message format.

Figure 9-1: The RIP-2 message format.

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